Automotive exhaust system

Details Automotive exhaust system Automotive exhaust system

1990-10-26

1993-05-25

Gellner, Michael L.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181239, 181240, 181265, F01N 700

Patent

active

052142531

ABSTRACT:
An improved automotive exhaust system comprises a flared expansion chamber having two inlet ports at its narrow end and three outlet ports at its wide end. The inlet ports extend a predetermined distance into the chamber to form therein a pair of lips that function as dams against migration of reversion pulses back up the exhaust pipes. The total area provided by the outlet ports is greater than that provided by the inlet ports. Exhaust gases fed to the chamber can thereby expand as they traverse the length of the chamber and can pass freely from the chamber through the outlet ports. Reversion pulses, which tend to migrate toward the inlet ports along the interior surface of the chamber, encounter and are reflected by the reversion dams and thus are inhibited from migrating back up the exhaust pipes to the engine. Engine performance and usable power is thereby enhanced.

REFERENCES:
patent: 2922486 (1960-01-01), McRee et al.
patent: 2996139 (1961-08-01), Patterson
patent: 3059423 (1962-10-01), Berlyn
patent: 3447630 (1969-06-01), Davidson
patent: 4574914 (1986-03-01), Flugger
patent: 4693339 (1987-09-01), Beale et al.
patent: 4800719 (1989-01-01), Campbell
patent: 4841728 (1989-06-01), Jean et al.

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